Pass exception on to program being debugged

Does NtCreateFile generate it's own file descriptors for kernel use? Do you recommend this for reference? How did you obtain the fh variable? As usual, posting a cogent example of the code you are trying to use would be helpful. File descriptors are not the same as the handles returned by functions like NtCreateFile. It seems to me that you are mixing up the APIs. It's visible in close. I haven't used the utility referenced in the above link.

However, I did notice that it is a bit long in the tooth, with its last update occurring over 10 years ago. Thanks for looking. Haven't got a login for the site, so I wasn't sure if it was worth it just for that. BTW, the file close. So your initial post makes even less sense to me.

Want to do a stack trace, would the answer to this be enough? However, there's something going on under the hood that I have no idea about: After stepping through the code at EndDialog hwnd , 0 ; there's a source file missing dialog.

If we place a break in close. Is this typical behaviour? I'd thought it would be a good idea to use the debug code, unfortunately it bombs with: lnk Ah yes, him.

Before the exception occurs there is a runtime error? We create the file and debug at the enddialog as before. The compiler processes the line:. So your use of VS puts you in uncharted waters for sure. And things are even messier if you are using a version of windows other than Win7.

Good luck with this The line does not make sense. Also see its note on Parameter Validation. It seems likely that is what you are running in to. This code was not written by the OP and is contained in the source for close. The query was posted here for the purpose of some insights as to what is going on here, albeit wishing me luck is very nice.

The first 2 values of fh referenced in close. What for? If n nested directories are created, the error always pops up with the last one created assuming the fh values correspond to the order of directory creation.

Exception thrown at 0xFA in BiggerDirectories. Unfortunately, more would treat input as text and modify line breaks. It would be better if the developers of this extension could fix this issue properly, by perhaps NOT using an intermediate launcher. The text was updated successfully, but these errors were encountered:. It's on our plan to solve encoding problems in a more systematic way, and I believe we will also remove launcher.

Sorry, something went wrong. Yes it is pretty clear what the launcher. However, we in Redmond don't normally refer to bugs as "side effects" Figure 1 Exception Handlers in the Stack The fact that the frames are kept in a linked list isn't just a minor detail in the grand scheme of things, it's a vital part of how SEH works.

When an exception occurs, the system starts at the head of the list, and invokes the exception handler with a code that says "This exception occurred.

Do you want to handle it? When this happens, the system moves to the next node in the linked list, and asks the same question. This sequence continues until a handler chooses to handle the exception, or the end of the list is reached.

I've drastically simplified the details of SEH here, but it's sufficient for our purposes. What are the ramifications of the SEH design? The important thing is that a given handler can choose what to do with an exception without regard to what any previously installed handlers which come later in the list might want to do with it.

Sometimes this can be a major pain. The following example shows why. Let's say that you've written the world's coolest exception handler. When something bad happens, your handler diagnoses the problem, logs relevant details, solves world hunger, and cancels the mind-numbing weekly staff meeting. Furthermore, you put your handler inside your main or WinMain function, so that your entire program is covered.

Now, at some point you call an external component, over which you have no control. That component also installs an exception handler, and a wimpy one at that. At the first sign of an exception, it turns tail and exits the program.

Your handler never gets the chance to execute because this other handler appeared first in the linked list of exception handlers. In short, the coolness of SEH is tempered by the fact that exception handlers are only effective if somebody deeper in the call chain hasn't installed one of their own. Allow me to throw one more bit of SEH trivia at you before moving on to vectored exception handling. When a program is being debugged and an exception occurs, a few more steps transpire.

First, the debugger is given a first chance to handle the exception, or allow the child process to see it. If the child process sees the exception, the steps outlined previously are followed. If no handler in the child process steps forward to handle the exception, the debugger receives a second chance to handle the notification. This is normally when a debugger pops up an unhandled exception dialog.

At this point, the process is as good as dead. In a nutshell, vectored exception handling is similar to regular SEH, with three key differences:. The new AddVectoredExceptionHandler API takes a function pointer parameter and adds the function's address to a linked list of registered handlers.

Because the system uses a linked list to store the vectored exception handlers, a program can install as many vectored handlers as it wants. How does vectored exception handling coexist with structured exception handling?

This works out well for compatibility with existing code. If the vectored exception list were to be processed after the SEH list, an SEH handler might handle the exception, and the vectored exception handlers wouldn't get a chance to see it. You can avoid such hazards by forbidding GDB from calling functions in the program being debugged. If calling functions in the program is forbidden, GDB will throw an error when a command such as printing an expression starts a function call in the program.

Sometimes, a function you wish to call is missing debug information. To avoid calling the inferior function incorrectly, which could result in the called function functioning erroneously and even crash, GDB refuses to call the function unless you tell it the type of the function.

For prototyped i. For example:. Casting the return type of a no-debug function is equivalent to casting the function to a pointer to a prototyped function that has a prototype that matches the types of the passed-in arguments, and calling that.